Reversible rotary blower



Aug. 8, 194 4. F. B. YINGLING REVERSIBLE ROTARY BLOWER 5 Sheets-Sheet l Filed Sept. 19, 1941 Allg 8, 1944 1 F. B. YINGLING 2,355,494

` REVERSIBLE ROTARY BLOWER Filed Sept. 19, 1941 3 Sheets-Sheet 2 :inventor Gtorneg 5 Aug. 8, 1944. F. B. YINGLlNG REVERSIBLE ROTARY BLOWER 3 Sheets-Sheet 3 Filed Sept. 19, 1941 m\ -`G a l u m f 6 f w www |l.. H 1%. M Q\ M Q Il E RG@ 1 l MM. F [N B, M N. NN Q @N w. @N w Patented Aug. 8, 1944 UNITED STATES PATENT oFFlcE e 2,355,494 Y v REVERSIBLE RoTARY LowEa- Frank B. Yingling, nannten, ohio ,Y Y Application september 19, 1941, srialNo. 411,560l

eolaims. (01.230-137) l `My present invention relates to an improved `reversible rotary blower capable' of delivering a desired Volume of fluid pressure when rotating in either forward or reverse direction, and control means are provided for changing the entry direction to, through, and out' of the blower casing, in accord with changes in the rotational movement of the blower. While my improved blower is adapted for impelling various fluid currents, it is particularly designed for impelling air, preferably at` comparatively low pressure for scavenging use with internal combustion engines of the Diesel type. When such engines are adapted for ship propulsion the blower of' my invention is especially applicable for combination with the engine, and the reversible blower is controlled by the reversing devices of the engine,

In carrying out my invention I have provided a compactly arranged blower that occupies comparatively small space, which is fashioned of a minimum number of parts to facilitate manufacture, installation, and operation of the apparatus; and which, because of its simplicity in construction, is easily operated when necessary, and durable. v

The invention consists in certain novel cornbinations and arrangements in the blower including an exterior housing and interior impeller casing, with` a single valve at each side of the casing to control an intake port and an outlet port, and means for changing the positions of the valves to vary the entry and delivery direction of air currents through the casing.4 In the accompanying drawings I have illustrated one complete example of the physical embodiment of my positive displacement blower, which is installed for use with a Diesel engine of the marine type.

Figure 1' is an end view of the engine showing the blower mounted thereon, and the control mechanism for the engine and the valve mechanism of the blower.

Figure 2 is a side elevation of the blower showing also in side elevation a portion of the end of the engine on which the blower is mounted.

Figure 3 is a vertical sectional view as at line l3--3 of Figure 1.

Figure 4 is a vertical sectional view transversely of the engine as at line 4-4 of Figure '2.

Figure 5 is a horizontal sectional view as at line 5 5 of Figure 4.

Figure 6 is a sectional view showing thebody of the blower, but with the interengaging impellers in section and rotating'in directionV opposite to that of Figure4, the two valves in positions opposite to the valves in Figure 4, and the air eurrents entering, passing through, and being delivered 'from the' casing in 'direction opposite tothat of Figure 4. p Y

lFigure 7 is a` vertical sectional view showing especially the details of the two impellers and their driving gears or pinions.

In order that utility of the blower may readily be appreciated, I have indicated in Figures 1 and 2 a portionof the engine vas E, with its main shaft or crankshaft lS fromfwhich the blower is operated, and inA Figure 2 is seen a portion of the air duct D that supplies low pressure air currents to the cylinders of "the engine for scavenging purposes, as well as air for'co'mbustion in the fuel mixture,

`The reversible positive displacement blower is shown as located or mounted on the end of the engine and extending transversely thereof, with the shafts of the rotaryinterengaging impellers and the hinges or pivots ofthe two control valves parallel with the main shaft S vof the engine.

`'I'h'e compactly arranged apparatus includes an exterior housing `I having openings in its opposite side walls, and these side openings are closed by exterior bearing plates 2 and 3 `which lalso form frame 'portions that are bolted to the opposite sides of the housing.

Within the housing and between these side plates is provided an interior impeller casing that includes ftwo'transversely extending, upper and llower, spaced'concaves 4 and' 5, here shown as approximately semi-circular in cross-section,

andinwhich the two interengaging impellers or rotors 6 and 'l' revolve in well known manner tocle'atethey air currents.'v These impellers vor rotors are sync-hronizedto rotate in opposite directions so'thatntheir outer wings will sweep through-the respective concaves and their inner Wings willco-operate to create the desired air blast,` which: passes through the two central wallopenings between the spaced concaves. In Figure4 therotor' is rotating clockwise and the rotor fl is-t'urning anti-clockwise for creating the passage of a'current ofl air fromfthe'rig-ht end openingthrough the-'interior casing to the left end thereof; as indicated by dotted arrows. It will be understood that when the engine is reversed the blower also is reversedgand the rotors of the impeller in Fig. 6 rotate as indicated by the' arrows, i.v e'.' rotor 6 turns anti-clockwise and rotor 1 turns clockwise to create the air current from the left" end of the casing, therethrough, and out at the right end ofthe casing.

These. two Vrotors of the impeller, which are shown as having hollow wings, are mounted on their respective shafts 8 and 9 and these shafts at their ends project through the sides of the casing, and also through bearing bosses I of the side plate 2 and bearing bosses I I of the side plate 3. These bosses are located on the outer sides of the side plates, and the ends of the shafts are journaled in the bosses and provided with usual fastening means as nuts as indicated.

The interengaging rotors of the impeller are synchronized for operation with the engine shaft S, and power is transmitted from the main shaft to the blower apparatus through an intermediate train of gears and pinions indicated as I2, I3, I4, |5 and I6, the large gear I2 being mounted on the engine shaft S, and the last small gears or pinions I and I6 being mounted on the ends close the angularly adjoining port, thereby providing a compactly arranged valve mechanism for directly controlling the movement of air currents to, through, and out of the impeller casing.

The valves are each provided with a hinge pin or journal pin as 24 and 25 respectively, which pins pass through the openings at the sides of the impeller casing, and as seen in Figures 1, 2, and 5 the ends of the pins are journaled in bearing bosses as 26 mounted upon Athe exterior sides of the plates 2 and 3 of the housing.

These hinge pins of the valves are connected with each other at the front of the blower by means of lever arms 2'I and 28 and the connecting link 29 and the arms and pins With their -valves are moved simultaneously by a pull or of the blower shafts as 4best seen in Figures 3 and 7.

The opposite sides of the interior casing including the ends of the concaves 4 and 5 are closed by the plates 2 and 2a and 3 and 3a, and the removal of these plates, of course, permits ready access to the interior of thecasing for servicing the rotors of the impeller and other parts of the blower.

As best seen in Figures 4 and 6 the several parallel edges of the spaced semi-circular or semi-cylindrical concaves 4 and 5 may be fashioned with out-turned lips or flanges that provide seats I1 along one edge of each of the four ports I8, I9, 20, and 2| that `are angularly disposed in pairs between the concaves, and the ports extend from one open side of the impeller casing to the opposite open side.

Each port I8 and I9 at opposite ends of the impeller casing merges with an adjoining wallopening in the casing, and these ports are alternately used as air intake ports opening into the interior of the casing. Each port 20, 2|, at opposite ends of the' impeller casing also merges with an adjoining wall-opening in the casing, and these ports 20, 2| which are disposed angularly of ports I8 and I9, are alternately used as outlet ports for air currents from the interior of the impeller casing.

In Figure 4 the lower right hand intake port I9 is shown as open, and the upper left hand outlet or delivery port 2| is open, While the lower left hand intake port I8 is closed by a pivoted or hinged flap valve 22, and the upper, right hand outlet or delivery port -is closed by an oppositely arranged pivoted or hinge valve 23. Thus it will be apparent that one valve closes an intake port while the other valve closes an outlet port at the opposite sides of the impeller, leaving an intake port open at one side of the impeller and an outlet or delivery port open at the opposite side of the impeller. These valves are connected so that they move simultaneously to change the flow of air currents through the blower casing when the rotary movements of the rotors are reversed in accord with the reversal of' movement of the engine shaft S.

In Figure 4 the valves are arranged so that the air current is' passing through the casing from` right toleft, while in Fig. 6 the positions of the valves have been changed and the air current is passing through the impeller casing from left to right.

As indicated in the drawings the adjoining portsat each side of the impeller are arranged at approximately 90-degree angles, and each valve is movable through an arc of approxi- 4oted to the 'lower free end of a lever arm 3| Y mounted on the valve pin at the rear of the mately ninety-degrees to open one valve port and blower.

As best seen in Figures 4 and 6 the two intake ports I8 and I9 open outwardly to a constant intakev chamber 32, and the outletor delivery ports 20 and 2| open outwardly from the interior of the impeller casing to an outlet'chamber or constant delivery chamber 33 for air under pressure. These respective chambers are shown in Figure 6 as inclosd within the exterior housing andV formed between the outer walls of the housing and the concaves of the interior impeller casing, which concaves are surrounded by the respectivechambers. The intake ports I8 and I9 afford direct communication between the constant intake chamber and the interior of the impeller casing, and the outlet ports 20 andf2| afford direct communication between the interior of the impeller casing. and the outlet or constant delivery chamber, and the valves 22 and 23 have direct control of these ports to change the direction of flow of air currents. The delivery chamber or pressure chamber 33 delivers air under pressure to the interior passage of an angular connection. 34 that unites the blower with the air duct D of the engine, and the intake chamber 32 receives air through the passage in the feed nozzle 35 and pipe 36.

It will be apparent that the air currents at all times move in the same direction through. the passage of the connection 34 toward the vair duct D of the engine, but the entry-direction of air to the impeller casing may be changed from one side of the impellers to the opposite side thereof thereby reversing the flow of air currents through the casing and changingthe outlet or delivery direction of air currents from one side to the other side of the impellers.

These changes in thev directional flow of air currents through the interior of the impeller casing may be under manual control, but when the blower apparatus is combined with the engine as illustrated the control of the valves is co-ordinated with the engine `control so that the valves are reversed from the engine control station by the engineer when the engine is reversed. Thus'the operation of the rotors and the control of the two valves are automatically controlled by and synchronized with the control of the engine. I

The engine control for forward and reverse movement of the shaft S is indicated in Figures 1 and 2 by a conventionalized hand lever 31 and the connecting link 38, and suitable linkageis provided to the link 30 (heretofore mentioned) as indicated at 39, 49, and 4|, for simultaneously changing the position Vof the two valves.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a reversible rotary blower, the combination with a housing having constant-volume spaced intake and delivery chambers, a constant interior casing within said housing located between the chambers, a pair of reversible rotary interengaging impellers within the casing and operating means therefor, of a Valve at one side of the impellers adapted to close an intake port and open an outlet port at one side of the impellers, a valve at the other side of the impellers adapted to open an intake port and close an outlet port. said valves being connected to operate simultaneously, and means for reversing the position of the valves.

2. In a reversible rotary blower, the combination with an exterior housing and a constant interior casing forming a constant intake chamber and a constant delivery chamber, said casing comprising spaced concaves `and having a pair of intake ports and a pair of outlet ports between the concaves, and reversible interengaging impellers mounted to rotate in the concaves and driving means therefor, of a valve at one side of the impellers adapted to open an intake port and close an outlet port, a valve at the other side of the impellers adapted to close an intake port and open an outlet port, said valves being connected to operate simultaneously,

and means for reversing the positions of the valves.

3. In a reversible rotary blower including an impeller casing having two intake ports and two outlet ports, said intake and outlet ports being arranged in pairs at opposite sides of the casing, a pair of reversible rotary interengaging impellers within the casing and operating means therefor, a valve pivoted at one side of the blower for controlling an intake port and an outlet port, a valve pivoted at the other side of the blower for controlling an loutlet port and an intake port, said valves being operatively connected for simultaneous movement, and means for reversing the positions of the valves, to reverse the passage of air currents through the casing.

4. In a reversible rotary blower, the combination with an exterior housing and a spaced interior casing forming a constant intake chamber and a constant delivery chamber, said casing comprising two spaced hemispherical concaves having each an intake port and an outlet port at each side of the blower, said ports being located between the interior of the casing and said chambers, and a pair of reversible rotary interengaging impellers within the casing and operating means therefor, of a valve at one side of the .casing controlling an intake port and an outlet port, another valve at the other side of the casing controlling an outlet port and an intake port, and means for reversing the positions of said valves to reverse the passage of air currents through the casing 5. In a reversible rotary blower including an impeller casing, the combination of interengaging rotary impellers mounted in the casing, and reversible means for driving the impellers, said casing having a pair of controlled and opposed intake ports and another pair of controlled and opposed outlet ports, and means co-acting with opposed wall-openings in the casing and operative to alternately open and close the ports in the vrespective pairs of ports to reverse the entry and delivery directions of air currents through the casing.

6. In a reversible rotary blower, the combination with an exterior housing having spaced constant intake and delivery chambers, of a casing located between said chambers, said casing having a pair of opposed and controlled intake ports adapted to be alternately opened and closed and a pair of opposed and controlled outlet ports adapted to be alternately opened and closed, rotary interengaging impellers mounted in the casing between pairs of ports, reversible means for driving the impellers, and two spaced movable devices coacting with openings in opposite endwalls of the casing operable to open and close the respective pairs of intake and outlet ports with relation to the respective intake and delivery chambers.

'7. In a reversible rotary blower, the combination with an exterior housing having spaced constant intake and delivery chambers, of a casing located between said chambers, said casing having a pair of opposed and controlled intake ports adapted to be alternately opened and closed and a pair of opposed and controlled outlet ports adapted to be alternately opened and closed, rotary interengaging impellers mounted in the casing between pairs of ports, reversible means for driving the impellers, two spaced movable devices co-acting with openings in opposite endwalls of the casing operable to open and close the respective pairs of intake and outlet ports with relation to the intake and delivery chambers, reversing means to control the driving means, and operative connections between said reversing means and said movable devices, whereby the entry and delivery directions of air currents are reversed through the casing.

8. The combination in a positive displacement blower, of an exterior housing and interior casing forming separate intake and delivery chambers in thek housing, reversible rotary impellers mounted in the casing and operating means therefor, said casing having wall-openings merging with the chambers at opposite sides of the impellers, means for controlling flow pivotally mounted between said chambers at opposite sides of the impellers and co-acting alternately with spaced edges of the wall openings, means for reversing the impellers and means cooperating therewith for reversing the positions of the means for controlling ow.

9. In a reversible blower, the combination of an exterior housing and interior casing forming separate intake and delivery chambers within the housing, interengaging rotary impellers mounted in the casing and operating means therefor, said casing having wall-openings at opposite sides of the impellers communicating with one or another of the chambers, a pair of opposed flap valves pivotally mounted between said chambers at opposite sides of the impellers with their free edges co-acting alternately with spaced edges of the wall openings, means for reversing the rotation of the impellers and cooperating means for reversing the positions of the valves.

FRANK B. YINGLING. 

